Robert Koch

Robert Koch (11 December 1843-27 May 1910) was a German physician and microbiologist who received the 1905 Nobel Prize in Physiology and Medicine for his research on tuberculosis. He also created Koch's postulates, four criteria for designating a relationship between a microbe and a disease.

Biography
Robert Koch was born in Clausthal, Hanover in 1843, and he graduated from the University of Gottingen medical school with the highest honors in 1866. He worked as a surgeon during the Franco-Prussian War and then became a physician in Wollstein, Posen (now Wolsztyn, Poland), and he served as an administrator and professor at Berlin University from 1885 to 1890. During the early 20th century, he began to study bacteria, tuberculosis, and the necessary steps to obtain the pure cultures in isolating disease-causing organisms. He died in 1910 at the age of 66.